Figure -.2

Confidence levels and likelihood statements used in the report. (Figure source: adapted from USGCRP 2016f1e633d5-070a-4a7d-935b-a2281a0c9cb6 and IPCC 2013f03117be-ccfe-4f88-b70a-ffd4351b8190; likelihoods use the broader range from the IPCC assessment). As an example, regarding “likely,” a 66%–100% probability can be interpreted as a likelihood of greater than 2 out of 3 chances for the statement to be certain or true. Not all likelihoods are used in the report.